While some people think that games aren't CPU based, and haven't been for a decade, that, unfortunately isn't entirely true. MANY games benefit from a mix of a stout processor and an equally powerful graphics card. To say that you can game with a single core or a 6 core processor is simply not the case. I don't know of many modern games that you can even launch with a single core....even if you had the most outrageous GPU setup.
The most common issue with an under-performing graphics card is the driver. Nvidia usually rolls out a driver every month, so just go to their website to get the newest. Always run the newest driver if possible. NEVER buy a card, bolt it in and install the driver from the disk that came with it.......unfortunately, by the time it gets to your house, the driver is outdated. Looking at your benchmark result above, it looks like there is a problem with your driver for the card. I'm not sure what exactly, but just check to see that it is the newest one for your class of card.
EDIT: Also, check your motherboard manufacturer's website to see if there is a BIOS update. I know some boards had trouble running the 670/680 when they first came out and some were fixed with a new graphics card driver, and the others were fixed via a BIOS update.